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Data Sheet No. PD60212 revC
Features
600V Half Bridge Driver
Integrated Bootstrap FET
Adaptive zero-voltage switching (ZVS)
Internal Crest Factor Over-Current Protection
0 to 6VDC Voltage Controlled Oscillator
Programmable minimum frequency
Micropower Startup Current (80uA)
Internal 15.6V zener clamp on Vcc
Small DIP8/SO8 Package
Also available LEAD-FREE (PbF)
Description
The IR2520D(S) is a complete adaptive ballast controller and 600V half-bridge driver integrated into a single
IC for fluorescent lighting applications. The IC includes adaptive zero-voltage switching (ZVS), internal crest
factor over-current protection, as well as an integrated bootstrap FET. The heart of this IC is a voltage con-
trolled oscillator with externally programmable minimum frequency. All of the necessary ballast features are
integrated in a small 8-pin DIP or SOIC package.
ADAPTIVE BALLAST CONTROL IC
IR2520D(S) & (PbF)
www.irf.com
1
Typical Application Diagram
Packages
8 Lead SOIC
IR2520DS
8-Lead PDIP
IR2520D
1
2
3
4
IR
252
0D
VCC
COM
VCO
LO
VS
HO
VB
8
7
6
5
FMIN
MHS
CBS
CVCC
RFMIN
F1
CBUS
RSUPPLY
DCP2
DCP1
LRES
CRES
CSNUB
CVCO
BR1
LF
CF
MLS
CDC
SPIRAL
CFL
L1
L2
IR2520D(S)& (PbF)
2
www.irf.com
Symbol
Definition
Min.
Max.
Units
V
B
High side floating supply voltage
-0.3
625
V
S
High side floating supply offset voltage
V
B
- 25
V
B
+ 0.3
V
HO
High side floating output voltage
V
S
- 0.3
V
B
+ 0.3
V
LO
Low side output voltage
-0.3
V
CC
+ 0.3
I
VCO
Voltage controlled oscillator input current (Note 1)
-5
+ 5
mA
I
CC
Supply current (Note 2)
-25
25
mA
dV
S
/dt
Allowable offset voltage slew rate
-50
50
V/ns
P
D
Package power dissipation @ T
A
+25
C
8-Lead PDIP
--
1
PD=(T
JMAX
-T
A
)Rth
JA
8-Lead SOIC
--
0.625
Rth
JA
Thermal resistance, junction to ambient
8-Lead PDIP
--
125
8-Lead SOIC
--
200
T
J
Junction temperature
-55
150
T
S
Storage temperature
-55
150
T
L
Lead temperature (soldering, 10 seconds)
--
300
Absolute Maximum Ratings
Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All voltage param-
eters are absolute voltages referenced to COM, all currents are defined positive into any lead. The thermal resistance
and power dissipation ratings are measured under board mounted and still air conditions.
V
C
W
C/W
Note 1: This IC contains a zener clamp structure between the chip VCO and COM, which has a nominal breakdown voltage
of 6V. Please note that this pin should not be driven by a DC, low impedance power source greater than 6V.
Note 2: This IC contains a zener clamp structure between the chip VCC and COM, which has a nominal breakdown voltage
of 15.6V. Please note that this supply pin should not be driven by a DC, low impedance power source greater than the
VCLAMP specified in the Electrical Characteristics section.
Note 3: Enough current should be supplied into the VCC pin to keep the internal 15.6V zener clamp diode on this pin
regulating its voltage, VCLAMP.
Recommended Operating Conditions
For proper operation the device should be used within the recommended conditions.
Symbol
Definition
Min.
Max.
Units
V
BS
High side floating supply voltage
V
CC
- 0.7
V
CLAMP
V
S
Steady state high side floating supply offset voltage
-1
600
V
CC
Supply voltage
V
CCUV+
V
CLAMP
I
CC
Supply current
Note 3
10
mA
R
FMIN
Minimum frequency setting resistance
20
140
k
V
VCO
VCO pin voltage
0
5
V
T
J
Junction temperature
-25
125
C
V
IR2520D(S) & (PbF)
www.irf.com
3
Electrical Characteristics
V
CC =
V
BS =
V
BIAS
= 14V +/- 0.25V, C
LO
=C
HO
=1000pF, R
FMIN
= 82k
and T
A
= 25
C unless otherwise specified.
Symbol
Definition
Min.
Typ. Max. Units Test Conditions
V
CCUV+
V
CC
and V
BS
supply undervoltage positive going
11.4
12.6
13.8
V
CC
rising from OV
threshold
V
CCUV-
V
CC
and V
BS
supply undervoltage negative going
9.0
10.0
11.0
threshold
V
UVHYS
V
CC
supply undervoltage lockout hysteresis
--
2.7
--
I
QCCUV
UVLO quiescent current
--
45
80
V
CC
= 10V
I
QCCFLT
Fault mode quiescent current
--
100
--
I
CCHF
V
CC
supply current f=85KHz
--
4.5
--
V
VCO
=0V
I
CCLF
V
CC
supply current f=35KHz
--
2.0
--
V
VCO
=6V
V
CLAMP
V
CC
Zener clamp voltage
14.4
15.4
--
V
I
CC
= 10mA
I
QBS
0
Quiescent V
BS
supply current
--
80
150
V
CC
=10V, V
BS
=14V
I
QBSUV
Quiescent V
BS
supply current
--
20
40
V
CC
=10V, V
BS
=7V
V
BSUV+
VBS supply undervoltage positive going threshold
7.7
9.0
10.3
V
V
BSUV-
VBS supply undervoltage negative going threshold
6.8
8.0
9.2
V
I
LK
Offset supply leakage current
--
--
50
A
V
B
= V
S
= 600V
f
(min)
Minimum oscillator frequency (Note 4)
29.6
34
38.2
V
VCO
=6V
f
(
max)
Maximum oscillator frequency (Note 4)
67
86
96
V
VCO
=0V
D
Oscillator duty cycle
--
50
--
%
DT
LO
LO output deadtime
--
2.0
--
DT
HO
HO output deadtime
--
2.0
--
I
VCOQS
I
VCO
quick start
--
50
--
V
VCO
=0V
I
VCOFS
I
VCO
frequency sweep
0.8
1.3
1.7
V
VCO
=2V
I
VCO_
5V
I
VCO
when VCO is at 5V
--
1.1
--
V
VCO_
max
Maximum VCO voltage
--
6
--
V
V
LO=LOW
LO output voltage when LO is low
--
COM
--
V
HO=LOW
HO output voltage when HO is low
--
COM
--
V
LO=HIGH
LO output voltage when LO is high
--
VCC
--
V
HO=HIGH
HO output voltage when HO is high
--
VCC
--
T
RISE
Turn on rise time
--
150
230
T
FALL
Turn off fall time
--
75
120
IO+
Output source short circuit pulsed current
--
140
--
mA
IO-
Output sink short circuit pulse current
--
230
--
mA
Note 4: Frequency shown is nominal for R
FMIN
=82k
. Frequency can be programmed higher or lower with the value of R
FMIN
.
S
kHz
A
V
A
mA
nS
mV
A
Supply Characteristics
Floating Supply Characteristics
Oscillator I/O Characteristics
Gate Driver Output Characteristics
IR2520D(S)& (PbF)
4
www.irf.com
Lead Definitions
Symbol
Description
VCC
Supply voltage
COM
IC power and signal ground
FMIN
Minimum frequency setting
VCO
Voltage controlled oscillator input
LO
Low-side gate driver output
VS
High-side floating return
HO
High-side gate driver output
VB
High-side gate driver floating supply
1
2
3
4
IR2520D(S)
VCC
COM
VCO
LO
VS
HO
VB
8
7
6
5
FMIN
Electrical Characteristics
V
CC =
V
BS =
V
BIAS
= 14V +/- 0.25V, C
LO
=C
HO
=1000pF, R
FMIN
= 82k
and T
A
= 25
C unless otherwise specified.
Symbol
Definition
Min.
Typ. Max. Units Test Conditions
V
VCO_RUN
VCO voltage when entering run mode
--
4.8
--
V
CSCF
Crest factor peak-to-average fault factor
--
5.0
--
N/A
V
S
offset = 0.5V
VS_
Maximum crest factor VS offset voltage
--
3.0
--
V
OFFSET_MAX
V
VCOSD
V
VCO
shutdown voltage
0.74
0.82
0.91
V
V
FMIN
FMIN lead voltage during normal operation
4.8
5.1
5.4
V
V
FMINFLT
FMIN lead voltage during fault mode
--
0
--
V
IBS1
VB current
30
70
-- C
BS
=0.1uF,
V
S
=0V
IBS2
VB current
10
20
-- VBS = 10V
Bootstrap FET
Minimum Frequency Setting Characteristics
Protection Characteristics
mA
IR2520D(S) & (PbF)
www.irf.com
5
Block Diagram
All values are typical
LO
VCC
5
HO
7
6
8
VS
VB
Bootstrap
FET
Control
Bootstrap
FET
High-Voltage Well
UVLO
Level-Shift
FETs
Q
S
R2
R1
VCO
FMIN
4
3
Driver
Logic
5V
5V
I
FMIN
I
FMAX
I
DT
R
RFMIN
I
FMIN
=
CT
5V
Fault
Logic
Q
S1
R2 Q
S2
R1
SET
RST
1V
0.8V
4.8V
UVLO
VCC
COM
1
2
15.6V
300ns
PGEN
Q
S
R
Q
5.1V
120uA
Q
T
R
Q
Level
Shift
PGEN
HIN
LIN
VS-Sensing
FET
Averaging
Circuit
x 5
VCC
I
QS
I
VCO
1us
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